DeepDream a code example for visualizing Neural Networks

Posted by Alexander Mordvintsev, Software Engineer, Christopher Olah, Software Engineering Intern and Mike Tyka, Software Engineer

Two weeks ago we blogged about a visualization tool designed to help us understand how neural networks work and what each layer has learned. In addition to gaining some insight on how these networks carry out classification tasks, we found that this process also generated some beautiful art.

Top: Input image. Bottom: output image made using a network trained on places by MIT Computer Science and AI Laboratory.

We have seen a lot of interest and received some great questions, from programmers and artists alike, about the details of how these visualizations are made. We have decided to open source the code we used to generate these images in an IPython notebook, so now you can make neural network inspired images yourself!

The code is based on Caffe and uses available open source packages, and is designed to have as few dependencies as possible. To get started, you will need the following (full details in the notebook):

• NumPy, SciPy, PIL, IPython, or a scientific python distribution such as Anaconda or Canopy.
• Caffe deep learning framework (Installation instructions)

Once you’re set up, you can supply an image and choose which layers in the network to enhance, how many iterations to apply and how far to zoom in. Alternatively, different pre-trained networks can be plugged in.

Itll be interesting to see what imagery people are able to generate. If you post images to Google+, Facebook, or Twitter, be sure to tag them with #deepdream so other researchers can check them out too.

Read More..

JDBC Database connection pool in Spring Framework – How to Setup Example

Setting up JDBC Database Connection Pool in Spring framework is easy for any Java application, just matter of changing few configuration in spring configuration file.If you are writing core java application and not running on any web or application server like Tomcat or  Weblogic,  Managing Database connection pool using Apache Commons DBCP and Commons Pool along-with Spring framework is nice choice but if you have luxury of having web server and managed J2EE Container, consider using Connection pool managed by J2EE server those are better option in terms of maintenance, flexibility and also help to prevent java.lang.OutofMemroyError:PermGen Space in tomcat by avoiding loading of JDBC driver in web-app class-loader, Also keeping JDBC connection pool information in Server makes it easy to change or include settings for JDBC over SSL. In this article we will see how to setup Database connection pool in spring framework using Apache commons DBCP and commons pool.jar

This article is in continuation of my tutorials on spring framework and database like LDAP Authentication in J2EE with Spring Security and  manage session using Spring security  If you haven’t read those article than you may find them useful.

Read more »

Read More..

Step By Step guide to Read XML file in Java Using SAX Parser Example

Reading XML file in java using SAX Parser is little different than reading xml file in Java with DOM parser which we had discussed in last article of this series. This tutorial is can be useful for those who are new to the java world and got the requirement for read an xml file in java in their project or assignment, key feature of java is it provides built in class and object to handle everything which makes our task very easy. Basically this process of handling XML file is known as parsing means break down the whole string into small pieces using the special tokens.

Parsing can be done using two ways:

Read more »

Read More..